Ignition timer



W. H- HUTCHINS.

IGMTION TIMER.

APPLICATION FILED FEB-26, 1920.

Patented Oct. 17, 1922.

//V VI 11/ 7' 01? Patented Oct. 17, 1922.

UNITED STATES PATENT. OFFICE.

wILLxAmn'nU'ronms, ornocfins'rnn, New YORK, ASSIGNOR TO NORTH EAST ELECTRIC COMPANY, OF ROCHESTER, NEW you, A CORPORATION or NEW YORK.

IGNITION TIMER.

Application tiled February-26, 1920. Serial No. 361,528.

To all whom it may concern:

. Be it known that I, WILLIAM H. Hurcrr INS, a citizen of theUnited States, residing at Rochester, in the county of Monroe and State ofNew York, have invented certain new and useful Improvements in Ignition Timers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich'it appertains to make and use the same.

This invention relates to the timing devices in electric ignition-apparatus for engines. In such apparatus it is common to employ a circuit-controller having a cam, or other rotary member, which is driven by connection with themechanism of the engine, and which cooperates with other members mounted in a normally stationary position within a heador casing. The timing of the ignition may be manually adjusted, in such an arrangment, by a partial rotation of the casing or head about the axis ofrotation of the cam or rotary-member of the circuit-controller, and it is customary to provide stops of some sort for limiting such partial rotation so as to prevent the time of ignition from either being too far advanced or too far retarded.

The object of the present invention is to provide an ignition-timer, of the type in question, with simple and effective means for limting the rotative adjustment as aforesaid, such means being preferably so formed that they may be readily adjusted to various positions according to the particular location and manner in which the ignitiontimer is to be applied and used.

To the foregoing end it is proposed to interpose, between the adjustable head and the support upon which it is mounted, a stop-member, preferably of annular form, and to connect the stop-member with the head and with the support, respectively, by means of cooperating recesses and abutments so arranged as to permit the necessary limited amount of relative rotation between the members of the timer. In the most complete embodiment of the invention the stop-member and one or another of the members with which it cooperates is pro vided with a series of such abutments of recesses adapted for alternative engagement with the corresponding parts, and the stop-member is conveniently mounted and provided with secured in place by being arranged tosurround the stem of the timer-head and rest upon the bearing-member or support in which this stem turns. 1

In the accompanying drawings Fig. l is a side-elevation of an ignition-timer embodying, the present invention, the stopmember and the supporting-member being shown partly in section. Fig. 2 is a partial side-elevation of the same parts, looking from left to right. in Fig. 1. Fig. 3 is a perspective view of the stop-member alone, on a slightly larger scale than the other figures. j The invention is illustrated as employed n connection with an ignition-timer having the usual head 5 within which the circuit controller is located. This head is mounted upon a stem 6 which forms the bearing for the shaft 7 by which the circuit-controller is actuated. This shaft is driven through gears 8, connected in any ordinary or suitable manner with the mechanism of the engine with which the timer is used.

The gears are inclosed in a. housing 9, which is providedwith an upwardly projecting sleeve 10. This sleeve constitutes the support or bearing, for the head 5 and the stem 6, thelatter being arranged to turn freely in the sleeve and being held therein by'means of a screw 11 which engages an annular groove in the stem. The head 5 is an arm 12 by which it may be turned to "ary the time ofignition, and this arm is, provided with a dependinglug 13 adapted to cooperate with stops to limit the adjusting movement of the casing.

The parts so far described are or may be of ord nary form, and the present invenvtion resides particularly in the form and arrangement of a stop-member which is interposed between and connected with the head and the support. This stop-member is shown as formed of sheet-metal and comprises a flat annular portion or ring 14, provided at its outer edge with a lateral projection on which are two upstanding stop-lugs 15. The ring 14 is arranged to surround the stem 6 and rest upon the upper end of the sleeve 10, and it is revented from rotating upon the sleeve by means of a dowelpin 16, which is fixed in the sleeve and en gages one or another of a series of recesses or perforations 17 in the ring. The stopand thus determine the range of rotative.

adjustment of thehead. The dQNVBll-PiILlii may be engagedwith anyone ofthe.8.-holfes 17 alternatively, so that there are eight possible positions these positions the range of adjustment of the timer-head is the same, butZtheBleVer 12:

will project in a different direction with respect to. the stationary parts of thelappa ratus. Thenmechanismamay thus be adapt ed for use: upon either the right-on theleft hand side of an engine, and ini connection with various arrangementsi and constructions of the means: employed: for connecting the lever 12 withhthe: manually operable means by which the time-of ignitiom iskc'ontrolled.

The invention isnot: limited to theembodiment thereof hereinbefore described'an d illustrated in the. accompanying drawings, but it may be embodied in various other forms within claims.

The invention claimed is z '1. In anignition-timer,: the combination, with two relatively rotatable members comprising a circuit-controller and a support therefor, of means, for limiting the relative rotation of said parts, comprising a ring provided with a series of recesses; an abutmentonione of saidpants adapted to engage said recesses alternatively; and abut- -ments, on the ring and the second of said parts, cooperating to limit relative :rotation of the. ring and said se'con'd part;

2. In an igniti on timer, the combination, with two relatively rotatable members comprising a circuit-controlled and I a. support therefor, of' astop for limiting jthe-relative rotationaof said members, said stop being normally fixed but being-adjustable to differ ent angular positions aboutthe= axis of "r0.- tation of said members;

3. In an ignition-timer, the combination, with two: relatively rotatable members comprising a circuit-controller and a support therefor, of means, for'limiting the relative rotation of said parts, comprising anannuof the stop-ring. In.--e'ach: of;

the terms of the following.

lar stop plate.v provided. with recesses; and abutmentsph on said members, engaging; said recessesand adapted to permit limited relative rotation of one ofrsaidmembersand said; annular stopplate;

4. In an ignition-timer, the combination of three members comprising a circuit-controller, a support therefor, and a stop-memberz;theicircuitscontroller being rotatable on the support; the stop-member and each of the other said membersbeing provided with stop-points in the form ofcooperating recesses and abutments whereby relative rota: tion' of thestO -member and each of the other members is limited and saidstoppoints on one -=of said: members being duplicated and arranged in a series alternatively operable-to 'adjust 'the-po'sition of the range of rotative movement of the circuit-con tro'lleri 5. In an ignition timer, the: combination of a support provided with a bearing a circuit-controller proVided With a stem supported and rotatable in? said bearing a stop member in the form or a ring surrounding said stem; cooperatingmeans on the stopmember andwthe support for limiting rotative movement ofthe stop-member, relatively tothesupport, about i3h6"fl'XlS-Of said stem; and cooperative means, on the stopmember and the circuit-controller,- for limiting relative rotation of the circuit-controller and t'he stop-member;

6; In an ignition-timer, the combination of a support providedwith a vertical bearing; a circuit-controller provided with a depending stem rotatable in-said bearing; a stop-member comprising a ring, loosely surrounding said stem and resting on the support, and tWolugs projecting from the ring, thering being provided with a circular series of perforations; a pin projecting from the support and engageable with-said perforations alternatively; and a projection, on the circuit-controller, movable between the lugs on thestop-member whereby the rota tionofthe circuit-controller relatively to the support is limited.

WILLIAM HUTCHINS. 

